Isotoma plant named ‘TMLU 1301’

ABSTRACT

A new and distinct cultivar of  Isotoma  plant named ‘TMLU 1301’ that is characterized by short, compact self-branching growth habit, mid-green compound leaves and bright single flowers which are vibrant purple in color. Each flower of ‘TMLU 1301’ bears a central contrasting bright yellow-green eye.

Genus and species: Isotoma axillaris.

Variety denomination: ‘TMLU 1301’.

BACKGROUND OF THE NEW PLANT

The present invention relates to a new and distinct cultivar of Isotoma,which is grown as an ornamental annual bedding plant for use in thegarden and landscape and in planted containers. The new cultivar isknown botanically as Isotoma axillaris, and will be referred tohereinafter by the cultivar name ‘TMLU 1301’. The genus Isotoma isoccasionally known by the alternate name Laurentia.

During the 1990s, the inventor's employer had commenced in Ipswich,Essex, United Kingdom a seed breeding program in the genus Isotoma fromwhich no cultivars were selected or introduced. In 2010, the inventorcommenced a breeding program to develop named cultivars of Isotoma withthe objectives of large flower size and novel flower colors. Theinventor was able to utilize seeds and seedlings from the previous seedbreeding program. The present invention is a result of the inventor'sdesire to develop a large flowered deep purple variety of Isotoma.

In 2010, the inventor carried out controlled pollination of thefollowing seedlings. For the male parent, the inventor used a seedlingraised as ‘LU11022’ (unreleased and unpatented) which exhibits verylarge deep pink flowers. For the female parent, the inventor used aseedling raised as ‘LU11039’ (unreleased and unpatented) which exhibitedlarge violet-blue flowers. Within the offspring of this pollination,coded as ‘LU12009’, one plant in particular impressed the inventor forits naturally prolific basal and lateral branching and its very largeglowing vibrant purple flowers. This plant was selected and wassubsequently named ‘TMLU 1301’.

‘TMLU 1301’ was first asexually propagated by the inventor in 2013 inIpswich, Suffolk, United Kingdom. Asexual propagation was accomplishedusing tip cuttings. Since that time, under careful observation, thedistinguishing characteristics of ‘TMLU 1301’ have been determinedstable and uniform, and to reproduce true to type in successivegenerations of asexual propagation.

SUMMARY

The distinguishing characteristics of ‘TMLU 1301’ are as follows: Incombination these traits set ‘TMLU 1301’ apart from all other existingvarieties of Isotoma known to the inventor. ‘TMLU 1301’ has not beentested under all possible conditions and phenotypic differences may beobserved with variations in environmental, climatic, and culturalconditions.

-   -   1. Plants of ‘TMLU 1301’ exhibit a short, compact growth habit.    -   2. Plants of ‘TMLU 1301’ are naturally self-branching and        spreading. Pinching or pruning is not required to maintain a        tidy plant.    -   3. The leaves of ‘TMLU 1301’ are deeply cut and are mid-green in        color.    -   4. ‘TMLU 1301’ bears vibrant purple single flowers.    -   5. Each flower of ‘TMLU 1301’ bears a bright yellow-green eye        which contrasts sharply with the purple color of the flower    -   6. ‘TMLU 1301’ flowers continually from early spring until fall.        First flowering has been observed as early as March in        California.    -   7. After one year of unrestricted growth, plants of ‘TMLU 1301’        are 30 cm in height and 30 cm in width.    -   8. ‘TMLU 1301’ prefers full sun in rich well-drained soil.    -   9. ‘TMLU 1301’ is a tender perennial which survives in USDA Zone        10 or warmer.

DESCRIPTION OF THE PHOTOGRAPHS

The photograph was taken of a six-months-old plant of ‘TMLU 1301’ whichhad been grown outdoors in a 10-cm container in Oxnard, Calif. Thephotograph illustrates the overall appearance of ‘TMLU 1301’ showing thecolors of its foliage and flowers as true as it is reasonably possibleto obtain in colored reproductions of this type.

DESCRIPTION OF THE NEW VARIETY

The following is a detailed botanical description of the new Isotomacultivar named ‘TMLU 1301’. Observations, measurements, values andcomparisons were collected from a plant grown outdoors in Santa Barbara,Calif. The observed plant was approximately one-year-old and was growingin a 5-gallon container. The plant had been grown without the use ofgrowth retardant chemicals or any pinching. Color determinations weremade in accordance with The 2007 Royal Horticultural Society ColourChart from London, England, except where general color terms of ordinarydictionary significance are used. The growing requirements of the newvariety ‘TMLU 1301’ are similar to the species.

-   Botanical classification:    -   -   Genus and species.—Isotoma axillaris.        -   Family.—Campanulaceae.-   Parentage: ‘TMLU 1301’ was selected as a seedling from the progeny    of the following parents.    -   -   Male parent.—Isotoma seedling designated ‘LU11022’.        -   Female parent.—Isotoma seedling designated ‘LU11039’.-   Plant:    -   -   Habit and shape.—Compact and upright.        -   Commercial category.—Annual.        -   Use.—As a bedding plant or container plant or for mixed            combination plantings.        -   Suggested commercial container size.—9 cm container and            larger.        -   Propagation method.—Vegetative cuttings.        -   Rooting system.—Fine.        -   Vigor.—Moderately vigorous once established.        -   Crop time (average).—3 months are required to produce a            flowering plant in a 9 cm container from an unrooted            cutting.        -   Dimensions (3 months, 9 cm container).—25 cm to 30 cm in            height and spread.        -   Dimensions (end of summer, 10-liter container).—30 cm in            height, 60 cm in spread.        -   Cultural requirements.—Performs best in full sun, with            moderate water, and most soil types.        -   Pest and disease susceptibility.—None known to the inventor.        -   Hardiness.—Frost sensitive: survives over-winter in USDA            Zone 10 and warmer.        -   Special growing recommendations.—None: plants are            self-branching and naturally low-growing and spreading.-   Stems:    -   -   Branching habit.—Both basal and lateral branching.        -   Basal stem quantity.—Approximately 10 basal stems produced            in one season.        -   Lateral stem quantity.—Approximately 5 lateral stems per            basal stem.        -   Stem shape.—Cylindrical.        -   Surface.—Glabrous.        -   Stem color.—138A.        -   Stem length.—15 cm to 20 cm.        -   Stem diameter.—4 mm at base.        -   Stem strength.—Moderately strong, wiry.        -   Internode (average).—1.5 cm.-   Foliage:    -   -   Leaf type.—Pinnately compound.        -   Leaf arrangement.—Alternate.        -   Leaf division.—Simple.        -   Leaf margin.—Smooth, entire.        -   Leaf surface (both surfaces).—Glabrous.        -   Leaf shape (outline).—Narrowly elliptic.        -   Leaf lobes.—Typically three long lobes and 5 or 6 short            lobes on each side.        -   Leaf dimensions.—7 cm to 9 cm in length, 3.0 cm to 4.5 cm in            width.        -   Lobe dimensions.—Large lobes are 2 cm in length and up to 7            mm in width. Small lobes are 5 mm to 10 mm in length and up            to 3 mm in width.        -   Leaf color (adaxial surface).—N137C.        -   Leaf color (adaxial surface).—138A.        -   Leaf and lobe apex.—Acute.        -   Leaf base.—Cuneate.        -   Venation pattern.—Pinnate.        -   Vein color (both surfaces).—As adjacent leaf tissue.        -   Attachment.—Petiolate.        -   Petiole surface.—Glabrous.        -   Petiole color.—138B.        -   Petiole shape, dimensions.—Caniculate, 1 cm length and 2.5            mm in width.-   Inflorescence:    -   -   Type.—Solitary flower.        -   Arrangement.—Axillary.        -   Blooming months.—March to October.        -   Flower quantity.—Typically 2 open flowers and 4 to 6 buds on            each lateral flowering branch.        -   Flower aspect.—Upright and outward facing.        -   Flower type.—Single, 5 petals fused at base to 5-lobed            corolla tube.        -   Flower dimensions.—Diameter: 3.5 cm to 4.0 cm, depth            (excluding corolla tube) 1 mm.        -   Persistent or self-cleaning.—Self-cleaning.        -   Peduncle shape.—Cylindrical.        -   Peduncle surface.—Glabrous.        -   Peduncle color.—138A except 144C at base.        -   Peduncle dimensions (average).—9 cm in length and 2 mm in            diameter.        -   Axillary peduncle angle.—30° away from the vertical.        -   Bud shape.—Obovate.        -   Bud apex.—Acute.        -   Bud color.—145B.        -   Rate of opening.—Rapid, from 1 to 2 days from visible bud to            fully open flower.        -   Bud surface.—Glabrous.        -   Bud dimensions.—8 mm in length, 4.5 mm in diameter.        -   Corolla (tube) shape.—Campanulate, 5-lobed.        -   Corolla dimensions.—Long tube, 2 cm in length and 3.5 mm. in            diameter.        -   Corolla surface (both surfaces).—Glabrous.        -   Corolla color (external surface).—145B and 145C with light            mauve longitudinal streaks closest to N80B.        -   Lobes (petals).—5 in number.        -   Lobe arrangement.—Rotate, two upper lobes slightly larger            than three lower lobes. Palate or eye: Lower lobes            cream-green at base giving appearance of strongly            contrasting eye.        -   Lobe shape.—Obovate.        -   Lobe dimensions (upper lobes).—14 mm in length, 8 mm in            width.        -   Lobe dimensions (lower lobes).—17 mm in height, 10 mm in            width.        -   Lobe (petal) arrangement.—Apopetalous, very slightly            overlapping, fused at base to fused corolla tube.        -   Lobe color (adaxial surface).—Ranges between N89C and N89D            except base.        -   Lobe base color (adaxial surface).—The purple color N89C to            N89D of the lobes stops abruptly laterally approximately 3            mm from lobe base, at which point lobe color becomes cream            and green-yellow. NN155A and 1A are both present at the base            of the lower lobes. Taken together, the lobe bases present            the effect of a contrasting bright yellow-green eye in the            purple-blue flower.        -   Lobe color (abaxial surface).—Very pale blue, paler than            91D.        -   Lobe margin.—Entire, edged N89C.        -   Lobe surface (both surfaces).—Glabrous.        -   Lobe apex.—Acuminate.        -   Lobe base.—Truncate (fused to corolla tube).        -   Calyx shape.—Campanulate.        -   Calyx dimensions.—5 mm in depth, 2 cm in diameter.        -   Sepals.—5 in number.        -   Sepal shape.—Very narrow lanceolate.        -   Sepal dimensions.—12 mm in length and 1 mm in width at sepal            base.        -   Sepals fused or unfused.—Unfused.        -   Sepal color (both surfaces).—138A.        -   Sepal margin.—Entire.        -   Sepal apex.—Acute.        -   Sepal base.—Cuneate.        -   Sepal surface (both surfaces).—Glabrous.-   Reproductive organs:    -   -   Stamens.—5 in number, attached approximately halfway along            corolla tube.        -   Stamen dimensions, color.—12 mm in length, less than 1 mm in            diameter, color between white and 144D.        -   Anthers.—Dorsifixed, oblong, 3 mm in length, 1 mm in width,            color: N187C.        -   Pollen amount.—Moderate, color: 160B.        -   Pistil.—1 in number, length 2 cm, width 1.5 mm, color ranges            between 145B and 145C.        -   Stigma.—Capitate, bi-lobed, 2 mm in diameter, color N186A.        -   Ovary (undeveloped).—Inferior, globose, 1 mm in diameter,            color 151D.-   Seeds: None observed.

COMPARISON TO PARENTAL LINES AND COMMERCIAL VARIETY

‘TMLU 1301’ may be compared with its parents. Whereas ‘TMLU 1301’exhibits very large purple flowers, the male parent ‘LU11022’ exhibitsvery large deep pink flowers, and the female parent ‘LU11039’ exhibitslarge, but smaller, violet-blue flowers. In addition, neither of theparents exhibit the naturally vigorous branching that characterizes‘TMLU 1301’

The closest comparison plant to ‘TMLU 1301’ which is known to theinventor is Isotoma axillaris ‘Beth's Blue’ (unpatented). In comparisonwith ‘Beth's Blue’, ‘TMLU 1301’ bears much larger flowers with broaderpetals and a deeper and more vibrant purple color to the petals. Inaddition, plants of ‘Beth's Blue’ exhibit a more open growth habit.

I claim:
 1. A new and distinct cultivar of Isotoma plant named ‘TMLU1301’ as described and illustrated herein.